Hi,
A 6 blink error code is ''Speaker Applied Voltage Trouble''
Here’s a link to the TV service manual that may help (see ''Chosen Solution'' for the link)
[post|50685]
To access the menus try using the Menu button on the side of the TV and navigate through the menus by using the Program Up/Down and Volume Up/Down buttons also on the side of the TV (see p.15 of the owner manual - see link above)